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mbedtls/tests/include/test/psa_crypto_helpers.h

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Create PSA-specific helper function file Create a specific file for helper functions that are related to the PSA API. The reason for a separate file is so that it can include <psa/crypto.h>, without forcing this header inclusion into every test suite. In this commit, psa_helpers.function doesn't need psa/crypto.h yet, but this will be the case in a subsequent commit. Move PSA_ASSERT to psa_helpers.function, since that's the sort of things it's for. Include "psa_helpers.function" from the PSA crypto tests. In the ITS test, don't include "psa_helpers". The ITS tests are meant to stand alone from the rest of the library.
2019-05-23 20:25:48 +02:00
/*
Move the one non-crypto-specific PSA helper macro to a new header Create a new header file psa_helpers.h and put the one helper macro that isn't specific to PSA crypto there. Use this header file in the ITS test suite.
2019-06-20 12:54:43 +02:00
* Helper functions for tests that use the PSA Crypto API.
Create PSA-specific helper function file Create a specific file for helper functions that are related to the PSA API. The reason for a separate file is so that it can include <psa/crypto.h>, without forcing this header inclusion into every test suite. In this commit, psa_helpers.function doesn't need psa/crypto.h yet, but this will be the case in a subsequent commit. Move PSA_ASSERT to psa_helpers.function, since that's the sort of things it's for. Include "psa_helpers.function" from the PSA crypto tests. In the ITS test, don't include "psa_helpers". The ITS tests are meant to stand alone from the rest of the library.
2019-05-23 20:25:48 +02:00
*/
Add Apache-2.0 headers to all source files Also normalize the first line of the copyright headers. This commit was generated using the following script: # ======================== #!/bin/sh # Find scripts find -path './.git' -prune -o '(' -name '*.c' -o -name '*.cpp' -o -name '*.fmt' -o -name '*.h' ')' -print | xargs sed -i ' # Normalize the first line of the copyright headers (no text on the first line of a block comment) /^\/\*.*Copyright.*Arm/I { i\ /* s/^\// / } /Copyright.*Arm/I { # Print copyright declaration p # Read the two lines immediately following the copyright declaration N N # Insert Apache header if it is missing /SPDX/! i\ * SPDX-License-Identifier: Apache-2.0\ *\ * Licensed under the Apache License, Version 2.0 (the "License"); you may\ * not use this file except in compliance with the License.\ * You may obtain a copy of the License at\ *\ * http://www.apache.org/licenses/LICENSE-2.0\ *\ * Unless required by applicable law or agreed to in writing, software\ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT\ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\ * See the License for the specific language governing permissions and\ * limitations under the License. # Clear copyright declaration from buffer D } ' # ======================== Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
2020-06-15 11:59:37 +02:00
/*
Update copyright notices to use Linux Foundation guidance As a result, the copyright of contributors other than Arm is now acknowledged, and the years of publishing are no longer tracked in the source files. Also remove the now-redundant lines declaring that the files are part of MbedTLS. This commit was generated using the following script: # ======================== #!/bin/sh # Find files find '(' -path './.git' -o -path './3rdparty' ')' -prune -o -type f -print | xargs sed -bi ' # Replace copyright attribution line s/Copyright.*Arm.*/Copyright The Mbed TLS Contributors/I # Remove redundant declaration and the preceding line $!N /This file is part of Mbed TLS/Id P D ' # ======================== Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
2020-08-07 13:07:28 +02:00
* Copyright The Mbed TLS Contributors
Create PSA-specific helper function file Create a specific file for helper functions that are related to the PSA API. The reason for a separate file is so that it can include <psa/crypto.h>, without forcing this header inclusion into every test suite. In this commit, psa_helpers.function doesn't need psa/crypto.h yet, but this will be the case in a subsequent commit. Move PSA_ASSERT to psa_helpers.function, since that's the sort of things it's for. Include "psa_helpers.function" from the PSA crypto tests. In the ITS test, don't include "psa_helpers". The ITS tests are meant to stand alone from the rest of the library.
2019-05-23 20:25:48 +02:00
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Rename psa_helpers.function to psa_crypto_helpers.h This file isn't like the other .function files: it isn't concatenated by a separate preprocessing script, but included via C preprocessing. Rename this file to .h. This isn't a normal C header, because it defines auxiliary functions. But the functions aren't big and we only have one compilation unit per executable, so this is good enough for what we're doing.
2019-06-20 12:40:56 +02:00
#ifndef PSA_CRYPTO_HELPERS_H
#define PSA_CRYPTO_HELPERS_H
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
#include "test/helpers.h"
tests: Create an include folder Create an include folder dedicated to include files for tests. With the upcoming work on tests for PSA crypto drivers the number of includes specific to tests is going to increase significantly thus create a dedicated folder. Don't put the include files in the include folder but in include/test folder. This way test headers can be included using a test/* path pattern as mbedtls and psa headers are included using an mbedtls/* and psa/* path pattern. This makes explicit the scope of the test headers. Move the existing includes for tests into include/test and update the code and build systems (make and cmake) accordingly. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-05-27 09:22:32 +02:00
#include "test/psa_helpers.h"
Create PSA-specific helper function file Create a specific file for helper functions that are related to the PSA API. The reason for a separate file is so that it can include <psa/crypto.h>, without forcing this header inclusion into every test suite. In this commit, psa_helpers.function doesn't need psa/crypto.h yet, but this will be the case in a subsequent commit. Move PSA_ASSERT to psa_helpers.function, since that's the sort of things it's for. Include "psa_helpers.function" from the PSA crypto tests. In the ITS test, don't include "psa_helpers". The ITS tests are meant to stand alone from the rest of the library.
2019-05-23 20:25:48 +02:00
Move the one non-crypto-specific PSA helper macro to a new header Create a new header file psa_helpers.h and put the one helper macro that isn't specific to PSA crypto there. Use this header file in the ITS test suite.
2019-06-20 12:54:43 +02:00
#include <psa/crypto.h>
psa: slot mgmt: Add unaccessed slots counter in stats Add a counter of unaccessed slots and use it in tests to check that at the end of PSA tests all key slot are unaccessed. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-10-30 11:54:03 +01:00
#include <psa_crypto_slot_management.h>
Create PSA-specific helper function file Create a specific file for helper functions that are related to the PSA API. The reason for a separate file is so that it can include <psa/crypto.h>, without forcing this header inclusion into every test suite. In this commit, psa_helpers.function doesn't need psa/crypto.h yet, but this will be the case in a subsequent commit. Move PSA_ASSERT to psa_helpers.function, since that's the sort of things it's for. Include "psa_helpers.function" from the PSA crypto tests. In the ITS test, don't include "psa_helpers". The ITS tests are meant to stand alone from the rest of the library.
2019-05-23 20:25:48 +02:00
Refactor PSA test helpers: don't depend on test_info access Refactor some PSA test helper functions and macros to avoid depending on test_info and test_fail inside functions. These identifiers are only defined in helpers.function, so they're only available in test suites, and not in test helper modules (tests/src/*.c) which are also linked into example programs. This is in preparation for moving function definitions from psa_crypto_helpers.h to psa_crypto_helpers.c. No behavior change. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-11-24 17:41:07 +01:00
/** Check for things that have not been cleaned up properly in the
* PSA subsystem.
*
* \return NULL if nothing has leaked.
* \return A string literal explaining what has not been cleaned up
* if applicable.
*/
Refactor PSA test helpers: move function definitions from .h to .c Move function definitions from psa_crypto_helpers.h to psa_crypto_helpers.c. No behavior change. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-11-24 17:34:30 +01:00
const char *mbedtls_test_helper_is_psa_leaking( void );
Test shutdown without closing handles Add some test cases that shut down and restart without explicitly closing handles, and check that the handles are properly invalidated.
2019-05-28 15:06:43 +02:00
Move the one non-crypto-specific PSA helper macro to a new header Create a new header file psa_helpers.h and put the one helper macro that isn't specific to PSA crypto there. Use this header file in the ITS test suite.
2019-06-20 12:54:43 +02:00
/** Check that no PSA Crypto key slots are in use.
Don't call TEST_ASSERT in PSA_DONE TEST_ASSERT jumps to the exit label, so it must not be called from cleanup code executed after the exit label. It's legitimate (and indeed very common) to call PSA_DONE in cleanup code, so PSA_DONE must not jump to exit. Define an auxiliary function test_fail_if_psa_leaking() that calls test_fail() with the error message provided by mbedtls_test_helper_is_psa_leaking(). This function currently needs to be in helpers.function rather than in a PSA-specific helper file because it calls test_fail which is defined in helpers.function. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2021-01-06 20:47:16 +01:00
*
* If any slots are in use, mark the current test as failed and jump to
* the exit label. This is equivalent to
* `TEST_ASSERT( ! mbedtls_test_helper_is_psa_leaking( ) )`
* but with a more informative message.
Test shutdown without closing handles Add some test cases that shut down and restart without explicitly closing handles, and check that the handles are properly invalidated.
2019-05-28 15:06:43 +02:00
*/
Don't call TEST_ASSERT in PSA_DONE TEST_ASSERT jumps to the exit label, so it must not be called from cleanup code executed after the exit label. It's legitimate (and indeed very common) to call PSA_DONE in cleanup code, so PSA_DONE must not jump to exit. Define an auxiliary function test_fail_if_psa_leaking() that calls test_fail() with the error message provided by mbedtls_test_helper_is_psa_leaking(). This function currently needs to be in helpers.function rather than in a PSA-specific helper file because it calls test_fail which is defined in helpers.function. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2021-01-06 20:47:16 +01:00
#define ASSERT_PSA_PRISTINE( ) \
do \
{ \
if( test_fail_if_psa_leaking( __LINE__, __FILE__ ) ) \
goto exit; \
} \
while( 0 )
New macro PSA_DONE for a clean PSA shutdown The new macro PSA_DONE calls mbedtls_psa_crypto_free, but before that, it checks that no key slots are in use. The goal is to allow tests to verify that functions like psa_close_key properly mark slots as unused, and more generally to detect key slot leaks. We call mbedtls_psa_crypto_free at the end of each test case, which could mask a bug whereby slots are not freed when they should be, but their content is correctly reclaimed by mbedtls_psa_crypto_free.
2019-05-23 20:34:30 +02:00
Move the one non-crypto-specific PSA helper macro to a new header Create a new header file psa_helpers.h and put the one helper macro that isn't specific to PSA crypto there. Use this header file in the ITS test suite.
2019-06-20 12:54:43 +02:00
/** Shut down the PSA Crypto subsystem. Expect a clean shutdown, with no slots
New macro PSA_DONE for a clean PSA shutdown The new macro PSA_DONE calls mbedtls_psa_crypto_free, but before that, it checks that no key slots are in use. The goal is to allow tests to verify that functions like psa_close_key properly mark slots as unused, and more generally to detect key slot leaks. We call mbedtls_psa_crypto_free at the end of each test case, which could mask a bug whereby slots are not freed when they should be, but their content is correctly reclaimed by mbedtls_psa_crypto_free.
2019-05-23 20:34:30 +02:00
* in use.
*/
Don't call TEST_ASSERT in PSA_DONE TEST_ASSERT jumps to the exit label, so it must not be called from cleanup code executed after the exit label. It's legitimate (and indeed very common) to call PSA_DONE in cleanup code, so PSA_DONE must not jump to exit. Define an auxiliary function test_fail_if_psa_leaking() that calls test_fail() with the error message provided by mbedtls_test_helper_is_psa_leaking(). This function currently needs to be in helpers.function rather than in a PSA-specific helper file because it calls test_fail which is defined in helpers.function. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2021-01-06 20:47:16 +01:00
#define PSA_DONE( ) \
do \
{ \
test_fail_if_psa_leaking( __LINE__, __FILE__ ); \
mbedtls_psa_crypto_free( ); \
} \
Refactor PSA test helpers: don't depend on test_info access Refactor some PSA test helper functions and macros to avoid depending on test_info and test_fail inside functions. These identifiers are only defined in helpers.function, so they're only available in test suites, and not in test helper modules (tests/src/*.c) which are also linked into example programs. This is in preparation for moving function definitions from psa_crypto_helpers.h to psa_crypto_helpers.c. No behavior change. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-11-24 17:41:07 +01:00
while( 0 )
New macro PSA_DONE for a clean PSA shutdown The new macro PSA_DONE calls mbedtls_psa_crypto_free, but before that, it checks that no key slots are in use. The goal is to allow tests to verify that functions like psa_close_key properly mark slots as unused, and more generally to detect key slot leaks. We call mbedtls_psa_crypto_free at the end of each test case, which could mask a bug whereby slots are not freed when they should be, but their content is correctly reclaimed by mbedtls_psa_crypto_free.
2019-05-23 20:34:30 +02:00
PSA return status coverage script Add infrastructure to run unit tests and collect the return values for every PSA API function that returns psa_status_t. ./tests/scripts/psa_collect_statuses.py >statuses.txt
2019-05-20 19:35:37 +02:00
#if defined(RECORD_PSA_STATUS_COVERAGE_LOG)
Refactor PSA test helpers: move function definitions from .h to .c Move function definitions from psa_crypto_helpers.h to psa_crypto_helpers.c. No behavior change. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-11-24 17:34:30 +01:00
psa_status_t mbedtls_test_record_status( psa_status_t status,
const char *func,
const char *file, int line,
const char *expr );
PSA return status coverage script Add infrastructure to run unit tests and collect the return values for every PSA API function that returns psa_status_t. ./tests/scripts/psa_collect_statuses.py >statuses.txt
2019-05-20 19:35:37 +02:00
/** Return value logging wrapper macro.
*
* Evaluate \p expr. Write a line recording its value to the log file
* #STATUS_LOG_FILE_NAME and return the value. The line is a colon-separated
* list of fields:
* ```
* value of expr:string:__FILE__:__LINE__:expr
* ```
*
* The test code does not call this macro explicitly because that would
* be very invasive. Instead, we instrument the source code by defining
* a bunch of wrapper macros like
* ```
* #define psa_crypto_init() RECORD_STATUS("psa_crypto_init", psa_crypto_init())
* ```
* These macro definitions must be present in `instrument_record_status.h`
* when building the test suites.
*
* \param string A string, normally a function name.
* \param expr An expression to evaluate, normally a call of the function
* whose name is in \p string. This expression must return
* a value of type #psa_status_t.
* \return The value of \p expr.
*/
#define RECORD_STATUS( string, expr ) \
Use mbedtls_test_ prefix on all PSA helper functions Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-11-24 17:07:05 +01:00
mbedtls_test_record_status( ( expr ), string, __FILE__, __LINE__, #expr )
PSA return status coverage script Add infrastructure to run unit tests and collect the return values for every PSA API function that returns psa_status_t. ./tests/scripts/psa_collect_statuses.py >statuses.txt
2019-05-20 19:35:37 +02:00
#include "instrument_record_status.h"
#endif /* defined(RECORD_PSA_STATUS_COVERAGE_LOG) */
Minor fixup of SKIP_IF test macro documentation verbiage Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
2021-02-10 17:02:05 +01:00
/** Skip a test case if the given key is a 192 bits AES key and the AES
* implementation is at least partially provided by an accelerator or
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
* alternative implementation.
*
Minor fixup of SKIP_IF test macro documentation verbiage Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
2021-02-10 17:02:05 +01:00
* Call this macro in a test case when a cryptographic operation that may
* involve an AES operation returns a #PSA_ERROR_NOT_SUPPORTED error code.
* The macro call will skip and not fail the test case in case the operation
* involves a 192 bits AES key and the AES implementation is at least
* partially provided by an accelerator or alternative implementation.
*
* Hardware AES implementations not supporting 192 bits keys commonly exist.
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
* Consequently, PSA test cases aim at not failing when an AES operation with
Minor fixup of SKIP_IF test macro documentation verbiage Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
2021-02-10 17:02:05 +01:00
* a 192 bits key performed by an alternative AES implementation returns
* with the #PSA_ERROR_NOT_SUPPORTED error code. The purpose of this macro
* is to facilitate this and make the test case code more readable.
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
*
* \param key_type Key type
* \param key_bits Key length in number of bits.
*/
#if defined(MBEDTLS_AES_ALT) || \
defined(MBEDTLS_AES_SETKEY_ENC_ALT) || \
defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_AES)
#define MBEDTLS_TEST_HAVE_ALT_AES 1
#else
#define MBEDTLS_TEST_HAVE_ALT_AES 0
#endif
#define MBEDTLS_TEST_PSA_SKIP_IF_ALT_AES_192( key_type, key_bits ) \
do \
{ \
if( ( MBEDTLS_TEST_HAVE_ALT_AES ) && \
( ( key_type ) == PSA_KEY_TYPE_AES ) && \
( key_bits == 192 ) ) \
{ \
mbedtls_test_skip( "AES-192 not supported", __LINE__, __FILE__ ); \
goto exit; \
} \
} \
while( 0 )
Minor fixup of SKIP_IF test macro documentation verbiage Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
2021-02-10 17:02:05 +01:00
/** Skip a test case if a GCM operation with a nonce length different from
* 12 bytes fails and was performed by an accelerator or alternative
* implementation.
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
*
* Call this macro in a test case when an AEAD cryptography operation that
Minor fixup of SKIP_IF test macro documentation verbiage Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
2021-02-10 17:02:05 +01:00
* may involve the GCM mode returns with a #PSA_ERROR_NOT_SUPPORTED error
* code. The macro call will skip and not fail the test case in case the
* operation involves the GCM mode, a nonce with a length different from
* 12 bytes and the GCM mode implementation is an alternative one.
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
*
Minor fixup of SKIP_IF test macro documentation verbiage Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
2021-02-10 17:02:05 +01:00
* Hardware GCM implementations not supporting nonce lengths different from
* 12 bytes commonly exist, as supporting a non-12-byte nonce requires
* additional computations involving the GHASH function.
* Consequently, PSA test cases aim at not failing when an AEAD operation in
* GCM mode with a nonce length different from 12 bytes is performed by an
* alternative GCM implementation and returns with a #PSA_ERROR_NOT_SUPPORTED
* error code. The purpose of this macro is to facilitate this check and make
* the test case code more readable.
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
*
Minor fixup of SKIP_IF test macro documentation verbiage Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
2021-02-10 17:02:05 +01:00
* \param alg The AEAD algorithm.
* \param nonce_length The nonce length in number of bytes.
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
*/
#if defined(MBEDTLS_GCM_ALT) || \
defined(MBEDTLS_PSA_ACCEL_ALG_GCM)
#define MBEDTLS_TEST_HAVE_ALT_GCM 1
#else
#define MBEDTLS_TEST_HAVE_ALT_GCM 0
#endif
#define MBEDTLS_TEST_PSA_SKIP_IF_ALT_GCM_NOT_12BYTES_NONCE( alg, \
nonce_length ) \
do \
{ \
if( ( MBEDTLS_TEST_HAVE_ALT_GCM ) && \
Rename AEAD tag length macros This brings them in line with PSA Crypto API 1.0.0 PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH -> PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG PSA_ALG_AEAD_WITH_TAG_LENGTH -> PSA_ALG_AEAD_WITH_SHORTENED_TAG Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
2020-12-16 11:36:46 +01:00
( PSA_ALG_AEAD_WITH_SHORTENED_TAG( ( alg ) , 0 ) == \
PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_GCM, 0 ) ) && \
tests: psa: Add macros to skip a test case Add macros to skip a test case when hitting a common alternative implementation limitation. Add a macro for AES-192 and GCM with a nonce length different from 12 bytes. Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2021-02-09 20:35:42 +01:00
( ( nonce_length ) != 12 ) ) \
{ \
mbedtls_test_skip( "GCM with non-12-byte IV is not supported", __LINE__, __FILE__ ); \
goto exit; \
} \
} \
while( 0 )
Rename psa_helpers.function to psa_crypto_helpers.h This file isn't like the other .function files: it isn't concatenated by a separate preprocessing script, but included via C preprocessing. Rename this file to .h. This isn't a normal C header, because it defines auxiliary functions. But the functions aren't big and we only have one compilation unit per executable, so this is good enough for what we're doing.
2019-06-20 12:40:56 +02:00
#endif /* PSA_CRYPTO_HELPERS_H */
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